package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @Description: User业务实现类
 * @BelongsProject: sky-take-out
 * @BelongsPackage: com.sky.service.impl
 * @Author: zhouzhijie
 * @CreateTime: 2023-11-20  16:08
 * @Version: 1.0
 */
@Service
@Slf4j
public class UserServieImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private  WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /**
     * @description: 微信登录
     * @author: zhouzhijie
     * @date: 2023/11/20 16:09
     * @param: [userLoginDTO]
     * @return:
     **/
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，返回微信用户openId
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，为空登陆失败，抛出业务异常
        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否新用户，新用户自动保存
        User user = userMapper.getByOpenid(openid);
        if (user == null){
            user = new User();
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);
        }


        return user;
    }

    /**
     * @description: 调用微信接口服务，返回微信用户openId
     * @author: zhouzhijie
     * @date: 2023/11/20 16:51
     * @param: [code]
     * @return: 
     **/
    private String getOpenid(String code) {
        //调用微信接口服务，返回微信用户openId
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type","authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
